By Gemma Sherlock & Phil Cooper
BBC News
Ex-footballers have visited schools to warn about the impact of chanting about tragedies suffered by rival clubs.
Former Liverpool and Manchester United players Phil Thompson and Wes Brown went to the Lord Derby Academy in Huyton, Merseyside.
Their visit followed recent incidents of so-called "tragedy chanting" at games between the two teams.
One man was charged with a public order offence after the teams played in the FA Cup on 17 March.
Mr Thompson and Mr Brown, representing the clubs' foundations, talked to pupils about the impact the chanting had on the teams, fans, and wider communities.